The preliminary report issued Tuesday by the National Transportation Safety Board does not reveal a possible cause for the Aug. 9 crash of the 10-seat airplane. The accident killed the two people on the plane and two girls inside a house in East Haven, Conn.

A witness driving along Interstate 95 told investigators he saw the plane traveling at a high rate of speed as it descended near Tweed-New Haven airport. Investigators said previously that the plane was inverted when it hit one of the houses.